与运行在系统测试环境中相比，应用程序进行负载测试的频次更少。
Typically, an application is load tested less frequently than it is run on the system test environment.
外部环境由企业中所有的应用程序和系统组成，包括人员。
The external environment consists of all the applications and systems, including people, in the enterprise.
通过将这些增强功能的实现应用于系统环境，可以在系统中优化内存性能。
The implementation of these enhancements, as they apply to your systems environment, can optimize memory performance on your box.
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